b'providingsupplementalfoundationsupportto anchors;ratherthelengthofembedment,thetheperimeterbeamand/orcolumnfootingsof installation angle and center to center spacing istheexistingstructure.ECPSteelPiersare the important elements in soil nail installations.recommendedtotransferthestructuralloadof Once all of the soil nails situated within the firsttheexistingbuildingfoundationtothedeepsupport provided by ECP Steel Piers.The ECP excavationincrementareinstalled,one-halfofSteel Piers not only reduce the surcharge on the the required thickness of shotcrete is placed onsoil mass, they prevent vertical settlement of the the wall followed immediately by the installationexistingfootingastheslightmovementofthe ofthewallplatesandreinforcingsteelmesh.soil mass occurs during the tensioning of the soil Thereinforcingmeshiscutlongenoughtonail matrix.If there are concerns with regard to providesuitablespliceoverlapatthenextlateral movements of the buildings footings, the increment of soil excavation.A surface coatingdesigner has the ability to prevent lateral footing ofshotcreteisinstalledoverthesteelmovementsoftheexistingstructurebyusing reinforcementtoprovidethefinalthicknessofTorqueAnchortiebackanchorsalongwith concrete specified by the engineer.All work isECPSteelPierstoprovidebothlateraland then left to cure prior to the next depth incrementvertical stability to the buildings footing. excavation.Figure6showsdetailsofatypicalsoilnail Priortothebeginningthenextexcavationinstallation.Usually four to five feet of soil is increment (usually the next day), the amount ofexcavatedandimmediatelyfollowedbythe slumpatthetopoftheexcavationmustbeinstallation of the first row of soil nails.Notice measured to insure that the recently installed soilthatthefirstrowhasthelongestshaftlength nailsareperformingasintended.Whenbecausethedistancetotheslipplaneisthe approved,thenextdepthincrementcanbegreatest.Thesoilnailisnotinstalledtoa excavated followed by the installation of the nextspecifiedtorsionrequirementliketieback rowofsoilnailsfollowedbytheimmediateinstallation of the first layer of shotcrete.TheORIGINAL LOCATION SOIL MASS SLUMP APPROXIMATELYOF SOIL MASS 1/8" LATERAL AND 1/8" VERTICAL FORSLIP PLANE EACH 5\' DEPTH EXCAVATEDFINAL LOCATION OFSOIL MASS AFTER ORIGINAL LOCATION OF SOIL MASSSLUMPFINAL LOCATION OF SOIL MASS AFTER SLUMPSOIL NAILS ARE LONGER AT THE TOP OFWALL AND BECOME SHORTER WITH DEPTH OFOF EXCAVATION.SOIL NAIL SHOULD HAVEEQUAL NUMBER OF HELICAL PLATES ON EITHERSIDE OF THE SLIP PLANESOIL NAILS SPACED IN AMATRIX USUALLY 4\' TO 5\'ROWS AND 4\' TO 6\' BETWEENNAILS ALONG THE WALLSHOTCRETE REINFORCEDWITH STEEL WITH THICKNESSUSUALLY 4" TO 6" THICKFigure 6.ECP Helical Torque Anchors Technical Service Manual2021 Earth Contact Products, L.L.C.2021-09 Chapter 3 - Page 56 All rights reserved'